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May Day Idaho Mine Complex 112 (d) Permit Application <br />All chemicals will be used entirely in the milling process and will be stabilized within the <br />mine tailings (Refer to Mine Plan Exhibit D). As described in section 6.4.20(5), the <br />tailings will be disposed within dry underground workings. This will be confirmed <br />during the mill optimization phase and a disposal procedure will be submitted to the <br />Division for review. If other disposal options are identified during the milling <br />optimization phase, these will be presented to the Division in a Technical Review <br />document. Further details regarding tailings disposal is described in Section 6.4.20(19). <br />(b) Narrative Description <br />(i) Designated Chemical Handling <br />Chemicals will be handled and stored in accordance with MSDS criteria. <br />Specifically for this operation, this includes the following: <br />• All materials will be transported to their designated storage location via <br />vehicle and unloaded by hand/loader; <br />• hazardous and petroleum products will be stored in secondary <br />containment structures having a storage capacity of at least 150% of <br />the material that is stored; <br />• Chemicals or hydrocarbons greater than 25 gallons will be <br />transported from the base of operation in dual walled containment <br />structures that is securely tied down; <br />• Storage locations will be locked and secured after business hours; <br />• Wildcat personnel will be trained appropriately in the proper storage and <br />use of site specific chemicals during the milling operation; <br />• Chemicals used in the milling operation will be opened an used within <br />the mill only; <br />• Recycled and process water storage tanks will be designed to contain <br />150% of the design storage volume; and <br />• Small volumes of designated chemicals (<25 gallon/3ft) will be handled <br />at any given time. <br />Chemicals consumed in the milling process will be disposed within dry tailings <br />in underground workings of the Mayday No. 1 operations as discussed in Section <br />6.4.20(19). <br />(ii) Toxic and/or Acid-Forming Material Handling <br />Available mine rock data indicates that it is neither toxic nor acid-forming <br />(Section 6.4.20.14). Additionally, all material handling will occur underground <br />and disposed within a dry stope. Further testing will be done within the mill <br />optimization phase to confirm that the stope is suitable for the disposal of <br />tailings. <br />REVISED June 5, 2011 <br />May Day Idaho Mine Complex 112(d) Permit Application <br />September 21, 2010 <br />5 <br />i -